Garlock GYLON 3500

Garlock GYLON 3500 is a silica-filled PTFE gasketing material. Available in sheets or pre-cut gaskets, it is engineered for demanding industrial applications involving strong acids, solvents, hydrocarbons, and other aggressive chemicals.

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Manufacturer Documentation

Our Quebec facility manufactures custom-cut flat gaskets to your exact specifications. VAMECA can also evaluate the supply of this part number or engineer a suitable replacement.

AT A GLANCE

Silica-filled PTFE

Product Family

PTFE

Material Composition

Silica-filled PTFE

TECHNICAL SPECIFICATIONS

Material Specifications

Maximum temperature and pressure limits cannot be applied simultaneously.

TEMPERATURE

-268 to 260°C

PRESSURE

83 bar

THICKNESSES

Thicknesses to be confirmed on the technical data sheet

Applications and Key Features

Garlock recommends GYLON 3500 for a wide range of aggressive chemical media, including strong acids, solvents, and hydrocarbons. Proper gasket selection requires careful evaluation of the process fluid, its concentration, and the specific assembly conditions.

Published Testing and Approvals

Standards, Testing, and Certification References

Standards / Testing: ASTM F36, ASTM F38 · Listed Approvals: ABS, FDA, USDA

PART NUMBER ANALYSIS

To properly select or replace this material

Why Silica Filler Matters

GYLON 3500 is a silica-filled PTFE sheet gasket material. It should not be treated as interchangeable with expanded PTFE, virgin PTFE, or PTFE modified with other fillers. The compound formulation directly impacts bolt load deformation, dimensional stability, and retention under thermal cycling. Published data sheet performance metrics must always be cross-referenced against concurrent temperature and pressure conditions.

Cross-Referencing and Alternative Options

Engineering reviews may evaluate modified PTFE sheet materials from Durlon, TEADIT, or KLINGER. Evaluate filler chemistry, published sealability ratings, stress relaxation properties, and required minimum seating stress. A material that is softer or chemically superior is not automatically suitable for the existing flange assembly. Flange face condition and available bolt load can alter the optimal product selection.

Essential Data for Material Selection

To evaluate an equivalent substitution, specify the exact manufacturer part number, gasket dimensions, and thickness, process media and concentration, operating pressure/temperature profiles, flange metallurgy, and bolting constraints. Verify all current site-specific regulatory approvals, standards, and plant restrictions. Technical review and verification are required before deeming any alternative drop-in interchangeable.

To evaluate design constructions, see: Garlock GYLON 3501-E and KLINGER top-chem 2005. While both are modified PTFE sheets engineered for chemical service, their formulations, creep-relaxation resistance, and operational envelopes remain distinct.

Why Silica Filler Matters

Cross-Referencing and Alternative Options

Essential Data for Material Selection

REPLACEMENT TO BE EVALUATED

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KEY COMPARISON CRITERIA

GYLON 3500 contains a silica filler, GYLON 3510 contains barium sulfate, and GYLON 3530 uses graphite. These formulation differences are far more critical than simply identifying a material as a PTFE family product when sourcing a replacement.

Need this gasket, custom cutting, or a replacement?

Part Number: Garlock GYLON 3500

Please provide the part number, thickness, dimensions, quantity, and process fluid. We will review material availability for the specified grade, custom cutting at our Quebec facility, or an engineered alternative tailored to your assembly.

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View official documentation

The manufacturer's latest datasheets, certifications, and P/T curves must be reviewed prior to ordering or substitution.

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RELATED PART NUMBERS

Compare Related Designs

Compare GYLON 3501-E and GYLON 3500 without assuming an identical formulation. KLINGER top-chem 2005 and Flexitallic SIGMA 511 utilize silica fillers, with operating limits specific to each individual grade.

REFERENCE SHEET

Flexitallic